Please investigate whether we can avoid using unsafe ChunkManager functions during point-in-time operations. Verify if alternative functions exist, or implement changes to ensure the CurrentChunkManager type is properly used to prevent misuse in point-in-time scenarios.

• getAllShardIds_UNSAFE_NotPointInTime
  cluster_aggregate.cpp 

• getAproxNShardsOwningChunks
  shard_key_pattern_query_util.cpp
  cluster_find.cpp
  write_op_analyzer.cpp